It's at least the third time in recent months that Trump has shared a poll that shows him trailing Clinton.

In June, he tweeted out two different polls that showed him losing by two points. One was a Quinnipac poll that showed him trailing 42-40. In another poll, by One America News Network, Trump was down 51-49.

Trump has gotten very little good polling news of late, both nationally and in battleground states. Clinton has led the last 21 national polls, according to RealClearPolitics, and most recent polls show her ahead by six points or more.

Twitter users immediately mocked Trump for sharing a poll that shows him losing: